You will need boxes and large plastic bags. If you only have thin ones, it’s better to use them doubled up—one inside the other—to ensure they are strong enough.
The key is not to overdo it and avoid making the packed load too large and heavy. Ideally, each package or box should weigh no more than 30 kg and have a circumference of no more than 80 cm. It’s also a good idea to attach makeshift handles using tape for convenience or to use shopping bags that come with handles and zippers. These bags are handy and can withstand heavy loads. However, overly bulky bags may drag on the ground due to their size or become impossible to lift. The more compact bags you have, the better.
Cardboard boxes are also excellent for packaging—they are even superior to other types of packaging and can be easily obtained at any nearby store or pharmacy.